CN107044980B - A kind of the optical coupling scanning tester and method of large area PMT - Google Patents

Abstract

The present invention discloses the optical coupling scanning tester and method of a kind of large area PMT, and device is mainly used for being scanned the uniformity of PMT test, including rotating platform and optically coupled device；PMT is rotatably installed on rotating platform, and rotating platform can drive PMT to rotate；Optically coupled device includes a light source, multiple light guides, a Guiding light support and a driving device, and Guiding light support is fixed on by light connector in the receiving end of each light guide；Driving device drives Guiding light support or light source mobile, to drive the receiving end of each light guide of light source alternative light connects；The output end of each light guide is equipped with light connector, each output end light connector is along the surface arranged for interval of PMT, and output end light connector is arranged along one first circumferential surface direction, in PMT rotation, the outer surface PMT is rotated along one second circumferential surface direction, and the first circumferential surface direction is intersected with the second circumferential surface direction；And the surface normal of multiple light guide light direction alignment PMT.It is particularly suitable for the sweep test of the PMT of large area.

Description

A kind of the optical coupling scanning tester and method of large area PMT

Technical field

This invention relates generally to the scan testing techniques of photoelectric device, in particular to a kind of at low cost and property The optical coupling scanning tester and method of large area PMT that can be stable.

Background technique

In nuclear electronics and nuclear detector field, high-energy physics experiment, nuclear electronics and nuclear detector development process are carried out In, it will use a large amount of large photoelectric device, such as large cathode diameter photomultiplier (abbreviation PMT).Although for small-sized photoelectricity Multiplier tube does not consider the uniformity of its effective area generally since its effective area is limited in use.But much test table It is bright, the either photocathode of the photocathode or spherical surface of plane, due to not having to carry out the system of photocathode using transfer cathod system It is standby, so the uniformity of its photocathode, is limited, it is impossible to be made very by antimony ball arrangement position and photocathode preparation process Uniformly.The uniformity of photocathode is also to measure a key parameter of evaluation photocathode performance quality as a result,.

In the prior art, for the photomultiplier tube PMT of the ball-type end window of small area, the scanning of surface uniformity is surveyed Examination, can be realized by simple three-dimensional rotation scanning platform.As illustrated in figures 1A and ib, Figure 1A and Figure 1B is in the prior art PMT scanning tester schematic diagram.Light source 61 can be fixed in stand, control tested PMT by two turntables It is rotated, test obtains its uniformity.Specific practice is as follows:

Such as first the PMT of 8 inch is horizontally mounted fixed on a vertical rotating platform 62, pass through this vertical rotation Turntable 62 realizes that around the rotation of a horizontal axis, the rotation that tested PMT realizes weft circle around central shaft is may be implemented in PMT, Corresponding to substantially motionless light source, it can accomplish the line surface sweeping test of difference in same weft circle.I.e. this turntable 62 is every Stop after rotating an angle, generates photosignal after waiting light sources driving PMT that photoelectric conversion occurs, then pass through relevant electronics System obtains electric impulse signal, completes single-spot testing.PMT rotates a circle under the control of turntable, completes single weft Data scanning test.

By above-mentioned PMT and this vertical turntable 62, then integral installation is to a horizontal rotating table 63, the horizontal rotating table 63 rotate around a vertical axis, can drive vertical turntable 62 and tested PMT around vertical axis by horizontal rotating table 63 Line rotates an angle, and the position for making tested PMT correspond to this changeless light source changes, and light source 61 be irradiated to by The specific latitude surveyed on PMT changes, and thus light source 61 irradiates another latitude, and then passes through rotary vertically direct rotary turntable 62, complete the corresponding weft sweep test of this latitude coil.

It repeats the above steps, the uniformity scanning to 8 inch spherical shape sample pipes, the result of sweep test such as Fig. 2A may be implemented And shown in Fig. 2 B.

And for the photomultiplier tube PMT of small-sized plane end window, the sweep test of surface uniformity can be by simple Two-dimensional scanning platform realize.It is translatable by X-axis (horizontal axis) and Y-axis (vertical axis) bidimensional, it is equal to plane to realize The sweep test of even property.It can be fixed light source, be translatable PMT sample pipe to be measured；It is also possible to fix to test sample pipe, be translatable light source, Being scanned can show that test result is as shown in Figure 2 C.

If the photomultiplier tube surface curvature radius is different at a distance from surface herein to 63 axle center of horizontal rotating table (usually It is different), when vertical turntable 62 rotates and carries out Position Latitude variation, it will light source 61 is caused to arrive the distance in pmt table face With enter that angular is different, this needs to manually adjust the position of light source 61 and angle, reinstalls again after usually dismounting, Zhi Houzai It is positioned by precise measurement.And this error operation inevitable appearance distance and enter optic angle, due to being high-precision photoelectricity Multiplier tube, test light may be controlled in single-photon-level, and the condition that this error will lead to each latitude test data foundation has Substantive difference will directly affect the uniformity interpretation of photocathode.

Also, for greater area of macrotype spherical or elliposoidal PMT, since its quality and volume are larger, so that making A possibility that large-area uniformity such with the scheme sweep test as shown in Figure 1A, Figure 1B, is lower.Not only to test sample pipe quality compared with Greatly, the mounting platform and counterweight of the corresponding large volume of large volume, it will the bearing condition beyond general rotating platform, so that rotation Turn platform cisco unity malfunction or is damaged.

For macrotype spherical or elliposoidal PMT, since this PMT test area is big, and light guide output end is required It is accurately matched with pmt table face, to guarantee that the light of output keeps stablizing on amount of light and angle, it is ensured that the accuracy of test. So in existing test operation mode, it is also necessary to which operator carries out this to correct amount of light and angle repeatedly.It can not be real Now automatically quickly test.

Meanwhile above-mentioned scanning theory is, one angle of every rotation is tested a point, is then rotated again, re-test, with this Analogize.The rotation of each turntable all can be than time-consuming during test, inefficiency.And due to the PMT mass of large area, Also shaking, the accuracy of strong influence test result can be generated in test.

Above- mentioned information are only used for reinforcing the understanding to background of the invention, therefore it disclosed in the background technology part It may include the information not constituted to the prior art known to persons of ordinary skill in the art.

Summary of the invention

A series of concept of reduced forms is introduced in Summary, this will in the detailed description section into One step is described in detail.The key that this part of the disclosure is not meant to attempt to limit technical solution claimed is special It seeks peace essential features, does not mean that the protection scope for attempting to determine technical solution claimed more.

A primary object of the present invention is to overcome at least one defect of the above-mentioned prior art, provide a kind of applicable The measuring device of the PMT of various areas is particularly suitable for the optical coupling scanning of the large area PMT of the scanning survey of large area PMT Test device.

For achieving the above object, the present invention adopts the following technical scheme:

According to an aspect of the invention, there is provided a kind of optical coupling scanning tester of large area PMT, is mainly used Test is scanned in the uniformity to PMT, which is characterized in that including rotating platform and optically coupled device；

The PMT is rotatably installed on the rotating platform, and the rotating platform can drive the PMT to rotate；

The optically coupled device includes a light source, multiple light guides, a Guiding light support and a driving device, each light guide Receiving end the Guiding light support is fixed on by light connector；The driving device drives the Guiding light support or light source mobile, with band Move the receiving end of each light guide of the light source alternative light connects；

The output end of each light guide is equipped with light connector, surface interval cloth of each output end light connector along the PMT It sets, the output end light connector is arranged along one first circumferential surface direction, and in the PMT rotation, the outer surface PMT is along a second week Face direction rotates, and first circumferential surface direction is intersected with second circumferential surface direction；And the multiple light guide light direction pair The surface normal of the neat PMT.

According to an embodiment of the present invention, wherein the distance between multiple receiving end light connectors on Guiding light support phase Together, and the distance of each receiving end light connector to the Guiding light support central point is all the same.

According to an embodiment of the present invention, wherein the light source is connect with the driving device, the driving device energy The light source is driven to rotate around the central point of the Guiding light support, the light source described whereby selectively alignment couples each receiving end light and connects Head.

According to an embodiment of the present invention, wherein first circumferential surface direction phase vertical with second circumferential surface direction Angle is acute angle between friendship or first circumferential surface direction and second circumferential surface direction.

According to an embodiment of the present invention, wherein further including a bracket, the optically coupled device is set to the bracket On, and a fixed plate is also equipped on the bracket, the multiple light guide is fixed on the bracket by the fixed plate.

According to an embodiment of the present invention, wherein further including a fixed frame, the fixed frame is installed on the rotary flat On platform, and the fixed frame is arranged concentrically with the rotating platform, and the fixed frame matches with the PMT, the PMT energy It is fixedly installed in the fixed frame；The optically coupled device is fixed on the outside of the fixed frame.

According to an embodiment of the present invention, wherein the bracket on be also equipped with a fixed guide rail, the fixation is led Rail matches with the PMT, and the multiple output end light connector is in turn secured on the fixed guide rail.

According to an embodiment of the present invention, wherein the driving device is stepper motor.

According to an embodiment of the present invention, wherein the light source is light emitting diode or laser diode.

According to another aspect of the present invention, a kind of method of the optical coupling sweep test of large area PMT, which is characterized in that There is provided an optical coupling scanning tester comprising rotating platform, optically coupled device and bracket；

The rotating platform can drive the PMT to rotate；

The optically coupled device includes a light source and multiple light guides, and the multiple light guide is used for the light source The light of sending is successively transmitted to the surface of the PMT；

The optical coupling scan testing methods of the large area PMT the following steps are included:

Measuring process: light source is successively transmitted to the surface of the PMT by the multiple light guide, and collects test data, To complete mono- longitude of the PMT or latitudinal test；

Spin step: the rotating platform drives the PMT rotation, by another longitude or Position Latitude of the PMT It is aligned the multiple light guide, light source is successively transmitted to the surface of the PMT by the multiple light guide；

Above-mentioned steps are iteratively repeated, to complete the test to the PMT.

As shown from the above technical solution, the advantages of the optical coupling scanning tester and method of large area PMT of the invention And have the active effect that

Rotating platform cooperation optically coupled device of the invention uses, and a variety of PMT can be measured, particularly with large area PMT's has preferable effect, and the scope of application is wider, and its structure is simple.In actual use, large area PMT can be vertical On the rotating platform, the uniformity sweep test to the PMT of quality and bulky may be implemented, and do not need counterweight in installation Component or special PMT fixed frame, operation installation are simple.Light connector is arranged furthermore with spherical multiple spot, and utilizes light Coupling device switches over, so the light connector in pmt table face does not need follow-up shift, avoids having used high-precision, high-cost Multiaxis turntable.

The fixed arrangement at multiple light guide intervals, when PMT is rotated and adjusted the angle, light guide keeps its position constant.It is logical The rotation to rotating platform is crossed, the light guide for fixing detected sample pipe always by position carries out the scanning of identical weft, passes through light Coupling device successively switches each light guide output light, to obtain the test data of the multiple spot along the first circumferential surface direction；And Rotating platform drives the rotation of detected sample pipe, the first circumferential surface direction scan data that each fixed light guide group can be obtained, edge Weft scanned again, be achieved in the sweep test entirely to test sample pipe surface uniformity.

Detailed description of the invention

Consider following the following detailed description of the embodiment of the present invention in conjunction with the accompanying drawings, various targets of the invention, Feature and advantage will become apparent.Attached drawing is only exemplary diagram of the invention, is not necessarily drawn to scale. In the accompanying drawings, same appended drawing reference always shows same or similar component.Wherein:

Figure 1A and Figure 1B is the schematic diagram of PMT scanning tester in the prior art.

Fig. 2A, Fig. 2 B and Fig. 2 C are the schematic diagram of the scanning result of PMT scanning tester in the prior art.

Fig. 3 is a kind of the vertical of the optical coupling scanning tester of large area PMT shown according to an illustrative embodiments Body schematic diagram.

Fig. 4 A and Fig. 4 B are a kind of schematic diagrames of optically coupled device shown according to an illustrative embodiments.

Fig. 5 A and Fig. 5 B are a kind of schematic diagrames of fixed guide rail shown according to an illustrative embodiments.

Fig. 6 is that a kind of sweep test of large area PMT scanning tester shown according to an illustrative embodiments is shown It is intended to.

Fig. 7 is a kind of sweep test knot of large area PMT scanning tester shown according to an illustrative embodiments The schematic diagram of fruit.

Wherein, the reference numerals are as follows:

1. rotating platform；

2. optically coupled device；

21. light source；

211. power supply unit；

22. light guide；

221. receiving end；

222. output end；

23. Guiding light support；

24. driving device；

25. shell；

3. bracket；

31. fixed plate；

32. fixed link；

4. fixed frame；

5. fixed guide rail；

61. light source；

62. vertical turntable；

63. horizontal rotating table；

100. fixed plate；

L1. the first circumferential surface direction；

The second circumferential surface of L2 direction；

PMT. photomultiplier tube.

Specific embodiment

Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure Label indicates same or similar structure, thus the detailed description that will omit them.

In the following description, a large amount of concrete details are given so as to provide a more thorough understanding of the present invention.So And it will be apparent to one skilled in the art that the present invention may not need one or more of these details and be able to Implement.In other examples, in order to avoid confusion with the present invention, for some technical characteristics well known in the art not into Row description.

A kind of optical coupling scanning tester for large area PMT that the embodiment of the present invention provides, is mainly used for PMT Uniformity be scanned test, PMT is specially photomultiplier tube.The optical coupling sweep test of large area PMT of the invention fills Set, mainly include rotating platform and optically coupled device,

In actual use, PMT is rotatably installed on rotating platform, and rotating platform can drive PMT to rotate；

Optically coupled device can specifically include a light source, multiple light guides, a Guiding light support and a driving device, each light guide Receiving end be fixed on Guiding light support by light connector；Driving device is mainly used for driving Guiding light support or light source mobile, to drive The receiving end of each light guide of light source alternative light connects；

Wherein the output end of each light guide can be equipped with light connector, and each output end light connector can be along between the surface of PMT Every arrangement, output end light connector arranges along one first circumferential surface direction, and when PMT rotates, and the outer surface PMT is along one second circumferential surface side To being rotated, the first above-mentioned circumferential surface direction and the second circumferential surface direction are in intersection；And multiple light guide light directions It is aligned the surface normal of PMT.

With reference to the accompanying drawing, it for the embodiment of the present invention, is illustrated below:

Fig. 3 is a kind of the vertical of the optical coupling scanning tester of large area PMT shown according to an illustrative embodiments Body schematic diagram.Fig. 4 A and Fig. 4 B are a kind of schematic diagrames of optically coupled device shown according to an illustrative embodiments.Fig. 5 A and Fig. 5 B is a kind of schematic diagram of fixed guide rail shown according to an illustrative embodiments.

As shown in figure 3, the optical coupling scanning tester of large area PMT of the embodiment of the present invention a kind of, is mainly used for Test is scanned to the uniformity of PMT, PMT specifically refers to photomultiplier tube.And the optical coupling sweep test dress of large area PMT It sets, mainly includes rotating platform 1 and optically coupled device 2.Above-mentioned PMT to be measured is rotatably installed on rotating platform 1, Rotating platform 1 can drive PMT to be measured to rotate.

Rotating platform 1 is specifically as follows with high-precision automatic rotating platform.High-precision rotary platform 1 needs to have extremely Few 20 kilograms of load-bearing capacity, because there is certain quality to test sample pipe PMT and fixed frame 4.And rotating platform 1 is also optional It selects with corresponding controller.Rotating platform 1 can specifically include air bearing driving and a power device, to improve it Running accuracy.But the present invention does not limit the type of rotating platform 1, as long as can reach higher precision can be used.In reality In the use process of border, rotating platform 1 can be specifically installed on a fixed plate 100, or the installation that can also directly fix Onto an optical platform, the stability of rotating platform should be ensured that in a word.Finally PMT to be measured can be fixedly installed in rotation On platform 1, and the two should be installed with one heart, drive PMT to be rotated along axis by rotating platform 1.Here rotating platform 1 selects Selecting is to lie against fixed plate 100, and rotating platform 1 can drive PMT and fixed frame 4 to rotate around a vertical axis.So it can avoid The gravity of PMT and fixed frame 4 influences running accuracy, can guarantee the precision of spinning movement, and do not influenced by other external force.

However it will be understood by those skilled in the art that rotating platform 1 be not necessarily fixed on fixed plate 100 or It on one optical platform of person, can also be fixed on other devices, as long as the balance and stability of guarantee rotating platform 1 are It can.

In one embodiment of the invention, the controller of rotating platform 1 can also be connect with distance host.By long-range Host controls rotating platform 1 according to the program of setting, the movement that is rotated and suspended.And cooperate optically coupled device 2, Access is cooperateed with other electronic systems again, to complete the sweep test to large area PMT uniformity.

As shown in Fig. 3, Fig. 4 A and Fig. 4 B, in one embodiment of the invention, optically coupled device 2 can specifically include a light Source 21, multiple light guides 22, a Guiding light support 23 and a driving device 24.Light source 21 can specifically use and use LED or laser two Pole pipe LD.It will be clear for those skilled in the art that light source 21 is also possible to other types of light source, the present invention is not limited Its concrete type.Light source 21 can be specifically powered by a power supply unit 211, and power supply unit 211 should correspond to light source 21 Type and be arranged, in order to drive light source 21, those skilled in the art be can be adjusted according to the actual situation, however this hair It is bright to be not restricted to this.Use LED as light source 21, mainly considers that its is low in energy consumption, the service life is long, and safety is stronger, it can be with Effectively improve the service life of the embodiment of the present invention.On the other hand, a signal generator can be used to drive light source 21 to shine. Light sources with different wavelengths, the LED of any wavelength from ultraviolet band to infrared band, realization pair can be also converted by replacement light source 21 The test of the photoelectric device of different photo cathode sensitivities.Amount of light can also be changed by adjusting on-load voltage.It is suitable for various The sweep test of different PMT.It will be clear for those skilled in the art that light source 21 is also possible to other types of light source, The present invention does not limit its concrete type.For example, Organic Light Emitting Diode OLED, quantum dot light source or other semiconductors hair Optical device；Light source can be various natures (natural) light source and artificial light sources, can be wide spectrum, monochromatic light, quick light source.Packet Include the various light sources or the various light sources for being unable to automatic and accurate adjusting that energy automatic and accurate is adjusted, such as the sun, carbon arc lamp, white heat Lamp, low-pressure sodium lamp, high-pressure sodium lamp, LED light, laser etc..It may be selected using external light source with light guide externally to light source box Interior importing.

Light guide 22 is linear oriented light-guiding part, and 22 both ends of light guide are respectively receiving end 221 and output end 222. Each 22 receiving end 221 of light guide can pass through light connector successively one light source 21 of light connects.It should be understood that light guide 22 is optional Selecting is a kind of fiber made of glass or plastics, can be used as light conduction tool, transmission principle is the total reflection of light.Due to general Light source emit beam be diverging, using fibrous light guide can directional input light, after through light guide 22 transmit In output end orientation output facula, output, diversity is smaller.Light connects refer to that the light of light source passes through attachment device or connection Mechanism connection is input in light guide 22, and light connects mode can be technological means commonly used in the art.

It can be installed on by light connector on Guiding light support 23 on the receiving end 221 of light guide 22, and the output end of light guide 22 222 light connector can along PMT to be measured surface interval setting, and by the light direction of light guide 22 be aligned it is to be measured The surface normal of PMT.The smooth connector of output end 222 can arrange along one first circumferential surface direction L1.When PMT rotates, the outer surface of PMT can It is rotated along one second circumferential surface direction L2, and the first circumferential surface direction L1 intersects with the second circumferential surface direction L2.

Guiding light support 23 can specifically use various material system, for example, by using plate structure made of metal, however it is of the invention Its specific material and shape are not limited.Guiding light support 23 may be provided with multiple light guide fixed sockets, the reception of light guide 22 Hold 221 smooth connectors are fixed to be inserted on Guiding light support 23, to complete the fixation of light guide 22.

Driving device 24 can drive Guiding light support 23 or light source 21 mobile, to drive each leaded light of the alternative light connects of light source 21 The receiving end 221 of part 22.In one embodiment of the invention, driving device 24 can specifically use a small stepper motor, with The high-precision operation for guaranteeing optically coupled device, it will be understood by those skilled in the art that driving device 24 is not necessarily Using stepper motor, other driving devices can also be used, if its when driving light source 21 or Guiding light support 23, Neng Goubao It demonstrate,proves higher precision and will not vibrate or its influence that not will receive extraneous shaking in driving can be used as the present invention The driving device 24 of embodiment.In addition optically coupled device 2 and above-mentioned rotating platform 1 keep relatively-stationary state, to avoid shadow Ring the accuracy of sweep test result.

In one embodiment of the invention, optically coupled device 2 can also include a shell 25, shell 25 can using with it is upper It states the same material of Guiding light support 23 to be made, this will not be repeated here.Shell 25 can be various shapes, can be with Guiding light support 23 are fixedly connected, and are coated on the outside of driving device 24 and light source 21, to protect driving device 24 and light source 21.But It is it should be understood that not comprising shell 25 in all of the embodiments of the present invention, in some other implementation of the invention In mode, shell 25 can also not used.

In one embodiment of the invention, the first circumferential surface direction L1 intersects vertically or first week with the second circumferential surface direction L2 Angle is acute angle between face direction L1 and the second circumferential surface direction L2.First circumferential surface direction L1 specifically can be PMT appearance to be measured The warp or weft in face.And the second circumferential surface direction L2 is equally also possible to the warp or latitude line of the outer surface PMT to be measured. Referring to shown in Fig. 3, for example, the first circumferential surface direction L1 is the warp of PMT to be measured.And rotating platform 1 is then along second week Face direction L2 rotation, i.e., drive PMT to be measured to be rotated along the weft direction of PMT to be measured, and the two intersects vertically, with convenient According to longitude and latitude localization method, the physical location in test result and pmt table face is subjected to Rapid matching.

Angle is the embodiment of acute angle between first circumferential surface direction L1 and the second circumferential surface direction L2, is referred to, first week Face direction L1 can be rotated around horizontal axis, preferably be determined though the first circumferential surface direction L1 and the second circumferential surface direction L2 intersect vertically to have It position and operates conveniently, but after the first circumferential surface direction L1 can be rotated around horizontal axis, utilizes the first circumferential surface direction L1 and the second circumferential surface Angle is acute angle between the L2 of direction, can reduce the spacing between surveyed multiple wefts, and can generate certain deviation.In this way, can select It selects and is tested in multiple angles, and by the way that the test result in multiple angles is iterated verification, it is closeer to form pixel The test result of collection, moreover it is possible to measuring accuracy be substantially improved.Certainly, under this situation, it should ensure that the smooth connector of each output end 222 extremely The spacing in pmt table face is equal.

Fig. 4 A and Fig. 4 B are a kind of schematic diagrames of optically coupled device shown according to an illustrative embodiments.Such as Fig. 4 A and Shown in Fig. 4 B, in one embodiment of the invention, the distance between smooth connector in multiple receiving ends 221 on Guiding light support 23 is identical, And the distance of the smooth connector in each receiving end 221 to 23 central point of Guiding light support is all the same.Light source 21 is connect with driving device 24, is driven Dynamic device 24 can drive light source 21 to rotate around the central point of Guiding light support 23, and 21 selectivity alignment of light source whereby couples each receiving end 221 smooth connectors.That is, the receiving end 221 of each light guide 22 is arranged in the shape of Guiding light support 23 as circle, during this is circular Heart point is the central point of Guiding light support 23, and the distance between two adjacent receiving ends 221 of light guide 22 are also identical.In reality Border is in use, can drive light source 21 to rotate an angle driving device 24, to be aligned the receiving end 221 of light guide 22 to complete Optical coupling, the light that each light guide 22 launches light source are transmitted to the surface of PMT to be measured.It, will in this exemplary embodiment Light source 21 is fixed on driving device 24, installation is fixed in Guiding light support 23, selection carries out light source in a manner of rotating light source 21 Switching between 21 and 22 receiving end 221 of multiple light guides, it is ensured that the installation accuracy of light connector is avoided because of 22 receiving end of light guide 221 are displaced and measuring accuracy are caused to reduce.

It will be understood by those skilled in the art that the receiving end 221 of light guide 22 is arranged on Guiding light support 23 Mode can there are many, such as receiving end 221 can arrange along Guiding light support 23 that and driving device 24 can drive along straight line Light source 21 linearly moves, and is successively optically coupled with multiple light guides 22, is emitted light source 21 by light guide 22 Light is transmitted to the surface of PMT to be measured.Therefore the embodiment of the present invention does not limit the specific cloth in receiving end 221 of light guide 22 Mode is set, those skilled in the art can voluntarily adjust according to the actual situation.

As shown in figure 3, further including a bracket 3 in one embodiment of the invention, 2 main body of optically coupled device is set to branch A fixed plate 31 is also equipped on frame 3, and on bracket 3, multiple light guides 22 are fixed on bracket 3 by fixed plate 31, to keep away Exempt from each light guide 22 when in use, each curved situation of the opposite sex, the standard of the further measurement for improving the embodiment of the present invention occurs True property.Bracket 3 is specifically as follows to be made of metal or plastic material, such as can use iron, stainless steel or aluminium alloy material Matter is made.Bracket 3 can be made of multiple fixed links 32, can also be made of a fixed link 32, be formed in fixed link 32 Installation position, bottom can be fixedly connected with fixed plate 100 by common connector, can be set on 32 side of fixed link multiple logical Slot, in order to which above-mentioned apparatus is fixed and is positioned by connector.Fixed link 32 may be selected to be the common bracket in laboratory, This is no longer described in detail.The present invention does not limit the particular number of fixed link 32.It in actual use, can be by the fixed peace of bracket 3 Loaded on a fixed plate 100 or on optical platform, setting bracket 3 can not only increase the stability of optically coupled device 2, and And the accuracy of sweep test can also be effectively improved, on the other hand since the sweep test to PMT need to be under unglazed environment It carries out, therefore bracket 3 can be also used for support shield cover.The embodiment of the present invention overall structure can also be made simple, be easy to make With.It should be understood that not must all have bracket 3 in all of the embodiments of the present invention, in other embodiments Bracket 3 can not included.

It further include a fixed frame 4 in one embodiment of the invention, fixed frame 4 is installed on rotating platform 1, and solid Determine frame 4 to be arranged concentrically with rotating platform 1, fixed frame 4 and PMT matches, and PMT, which is capable of fixing, to be installed in fixed frame 4；The optocoupler It attaches together and sets 2 and be fixed on 4 outside of the fixed frame.Fixed frame 4 can also be specifically made of material identical with above-mentioned bracket 3, There are many selections not therefore to be described in detail for its specific material.What fixed frame 4 can be fixed is installed on rotating platform 1, by Rotating platform 1 drives fixed frame 4 to rotate, and the two is Concentric rotation, and the connection type of fixed frame 4 and rotating platform 1 can be with Using various ways, those skilled in the art can voluntarily select according to the actual situation.It should be understood that due to be measured PMT's itself has various shapes, therefore the specific shape of fixed frame 4 should correspond to PMT to be measured and design.As shown in figure 3, Fixed frame 4 in the present embodiment corresponds to PMT to be measured and is designed as the shape for being similar to funnel, with to be measured for fixing PMT.

Fig. 5 A and Fig. 5 B are a kind of schematic diagrames of fixed guide rail shown according to an illustrative embodiments.Incorporated by reference to reference Shown in Fig. 3, Fig. 5 A and Fig. 5 B, in one embodiment of the invention, a fixed guide rail 5, fixed guide rail are also equipped on bracket 3 5 match with PMT, and the smooth connector of multiple output ends 222 is in turn secured on fixed guide rail 5.The shape of fixed guide rail 5 is more to guarantee The distance in a output end 222 smooth connector to pmt table face is equal.Fixed guide rail 5 specifically can be using the material such as above-mentioned bracket 3 It is made, the present invention is not intended to limit its specific material.Specifically, fixed guide rail 5 be set to bracket 3 two fixed links 32 it Between, and be located above above-mentioned pmt table face to be measured, and matched.Shape itself additionally, due to PMT is not also solid It is fixed, therefore fixed guide rail is also and non-fixed form.As shown, it is arc-shaped that guide rail 5 is fixed in the present embodiment, light guide 22 Output end 222 is in turn secured on fixed guide rail 5 by light connector.

As shown in figure 3, PMT is set on rotating platform 1 in the embodiment of the present invention for vertical, rotating platform 1 is perpendicular along one Histogram to axis rotation, drive PMT rotated around vertical line to complete the scanning survey of PMT.However those skilled in the art should Understand, the present invention is not limited to the modes of above-mentioned sweep test.In other embodiments, it such as can also rotate Platform 1 is rotated by 90 °, and other each components also correspond to rotating platform 1 and are arranged, and what PMT can also be horizontal is set to rotating platform 1 On, and rotating platform 1 vertically rotates at this time, and PMT is driven vertically to rotate with the complete scanning survey to PMT.

The present invention also provides a kind of methods of the optical coupling sweep test of large area PMT, provide an optical coupling sweep test Device comprising rotating platform 1, optically coupled device 2 and bracket 3；Rotating platform 1 can drive PMT to be measured to rotate；Optical coupling Device 2 includes a light source 21 and multiple light guides 22, and multiple light guides 22 are for successively passing the light of the sending of light source 21 Transport to the surface of PMT to be measured；

The optical coupling scan testing methods of large area PMT the following steps are included:

Measuring process: the light that light source 21 issues successively is transmitted to the surface of PMT to be measured by multiple light guides 22, and is led to It crosses electronic system and collects test data, to complete mono- longitude of PMT to be measured or latitudinal test；

Spin step: rotating platform 1 drives PMT to be measured to rotate, by another longitude or Position Latitude of PMT to be measured Multiple light guides 22 are aligned, light source 21 is successively transmitted to the surface of PMT to be measured by multiple light guides 22；

Above-mentioned steps are iteratively repeated, to complete the test to PMT.

Below with reference to attached drawing, to the optical coupling scan testing methods of large area PMT of the invention, detailed description are as follows. Fig. 6 is a kind of sweep test schematic diagram of large area PMT scanning tester shown according to an illustrative embodiments.Fig. 7 It is a kind of schematic diagram of the sweep test result of large area PMT scanning tester shown according to an illustrative embodiments.

In one embodiment of the invention, light guide is selected as optical fiber to be illustrated, and the quantity of optical fiber can be set Be set to 10, and number be 1.~10..In actual measurement, light source first is issued to meet and be surveyed under the driving of external power supply Try desired light.Light source is located at initial position at this time, and the light for issuing light source of corresponding 1. number optical fiber is transmitted to PMT to be measured Surface, carry out dependence test.However consider the nuance and each optical fiber property of optically coupled device and every fiber coupling Parameter it is inconsistent, scale need to be carried out to the output intensity of every optical fiber first.It keeps light source on-load voltage constant, successively switches To each optical fiber, corresponding optical fiber output intensity is measured using power meter or photoelectric detector, completes the measurement to all optical fiber Afterwards, each measured value ratio is calculated, is recorded for being modified to photomultiplier tube scanning result.

After the test of this point to be done, driving device drives light source to rotate by a certain angle, and reaches the position of 2. number optical fiber, The corresponding light that 2. number optical fiber issues LED light source 23 is transferred to the surface of PMT to be measured by optical fiber, carries out dependence test.

Then it constantly repeats the above steps, driving device drives light source to rotate a circle according to certain angle, respectively corresponds 1.~9. number optical fiber, the optical signal of light source, which passes sequentially through optical fiber and is transferred to PMT different location to be measured, to be tested, 10. number optical fiber It can be used as spare.

After being sequentially completed the test of this ten points, driving device drives light source to carry out reset operation under program, Return to the position of 1. number optical fiber.Why reset operation is carried out, is that electric wire is needed to connect power supply due to light source, it is supplied Electricity, if without resetting after rotating a circle, it will cable winding, the failure that can not be finally operated occurs.

The overall flow of the scan testing methods of the embodiment of the present invention is as follows:

Step 1: large area PMT to be measured can be installed on PMT rotating platform.

Step 2: opening light source in initial position (i.e. the 1. position of number optical fiber), tested PMT is tested as desired Access.Then driving device starts, and according to the program of setting, successively rotates to 2.~9. number optical fiber, cooperates with other electronics The data scanning of the corresponding position PMT 1~9 is completed in access, and as shown in Figure 6, one piece of yin on pmt table face is completed in this wheel test The sweep test of shadow sector.

Step 3: opening rotating platform, according to setting program, suspend rotation after being driven tested PMT to rotate by a certain angle Turn, then repeatedly second step to complete the scanning of another sector.

Step 4: repeating third step, the sweep test of entire pmt table area is completed.

In above-mentioned test process, signal generator used in driving device, rotating platform and light source, photomultiplier tube High voltage power supply and data acquisition equipment can be by the software kit program control operations on computer.

Specific test principle is as follows:

1.PMT does not rotate that corresponding longitude is constant, and light source variation is to complete the scanning of different latitude position:

Drive light source rotation by driving device, in the case where the tested position PMT is fixed, successively by light pass through 1.~ 9. number optical fiber transports light to the surface of PMT, it is equivalent to light source position variation, so that identical longitude, the PMT of different latitude is mono- In elemental area, light irradiation is successively obtained, photoelectric conversion process is completed, and then combine electronics, completes data acquisition.Then pass through Rotating platform driving PMT is rotated to an angle, successively in multiple sectors of PMT into and sweep test, after PMT rotates a circle Complete the sweep test to PMT.

2. light source does not rotate, corresponding latitude is constant, and PMT variation is to complete different longitude station scannings:

By the rotation of rotating platform, in the case where light source is fixed, such as light source is fixed on the position of 1. number optical fiber, light Source may be selected to be always on or the modes such as glittering.PMT is driven to rotate a circle by rotating platform at this time, it is corresponding to complete different longitudes In sector, but the sweep test of the corresponding surface elemant of Same Latitude.The angle of rotating platform rotation can be according to scanning Density degree is set.Then driving device drive light source, make light source successively with 2.~9. number optical fiber coupled, be sequentially completed The sweep test of each latitude area of PMT finally carries out the sweep test result in the result of sweep test and above-mentioned steps 1 Comparison verification, it is as shown in Figure 7 with the corresponding photocathode quantum efficiency uniformity for obtaining final.

In conclusion the advantages of scanning tester and method of large area PMT of the invention and having the active effect that

Rotating platform cooperation optically coupled device of the invention uses, and a variety of PMT can be measured, particularly with large area PMT's has preferable effect, and the scope of application is wider, and its structure is simple.In actual use, large area PMT can be vertical On the rotating platform, the uniformity sweep test to the PMT of quality and bulky may be implemented, and do not need counterweight in installation Component or special PMT fixed frame, operation installation are simple.

The fixed arrangement at multiple light guide intervals, in PMT rotation, light guide keeps its position constant.By to rotation The rotation of platform makes detected sample pipe by the fixed light guide in one group of position while can carry out the scanning of identical weft every time； And rotating platform drives the rotation of detected sample pipe, and it can be by each fixed light guide group acquisition through line scan data, along latitude Line is scanned again, is achieved in the sweep test entirely to test sample pipe surface uniformity.

Optically coupled device uses the same light source, so that identical light is passed through different location by rotation position difference Light guide, pass to the different location of tested PMT, and then realize the uniformity test of different location, and same due to using Light source, it is ensured that the consistency and stability of light source effectively improve accuracy of the invention.It is solid additionally, due to multiple light guides Fixed arrangement, before sweep test, it is only necessary to which the successively light extraction efficiency of scale difference light guide obtains normalized scale system Number, so that it may by more light guides go out light as identical data come using, with further increase this hair measurement it is accurate Property.

It should be understood that multiple examples described above can along multiple directions (such as inclination, reverse, horizontal, vertical, etc.) and It is utilized with multiple constructions, without departing from the principle of the present invention.Embodiment shown in the accompanying drawings is only used as the principle of the present invention The example effectively applied and be shown and described, any concrete details that invention is not limited to these embodiments.

Certainly, once thinking over the above description of representative embodiment, those skilled in the art are just it will be readily understood that can A variety of remodeling, addition, substitution, deletion and other variations are made to these specific embodiments, and these variations are in this hair In the range of bright principle.Therefore, the detailed description of front should be clearly understood that it is only to come by way of illustration and example It provides, the spirit and scope of the present invention are only limited by the appended claims and its equivalent.

Although disclosing the present invention referring to some embodiments, before without departing substantially from the scope of the present invention and scope It puts, a variety of variants and modifications can be carried out to the embodiment described.It will therefore be appreciated that the invention is not limited to illustrated Embodiment, protection scope should by appended claims content and its equivalence structure and scheme limit.

Claims (10)

1. a kind of optical coupling scanning tester of large area PMT, is mainly used for being scanned test to the uniformity of PMT, It is characterised in that it includes rotating platform and optically coupled device；

The PMT is rotatably installed on the rotating platform, and the rotating platform can drive the PMT to rotate；

The optically coupled device includes a light source, multiple light guides, a Guiding light support and a driving device, and each light guide connects Receiving end is fixed on the Guiding light support by light connector；The driving device drives the Guiding light support or light source mobile, to drive State the receiving end of each light guide of light source alternative light connects；

The output end of each light guide is equipped with light connector, surface arranged for interval of each output end light connector along the PMT, institute It states output end light connector to arrange along one first circumferential surface direction, in the PMT rotation, the outer surface PMT is along one second circumferential surface side To rotation, first circumferential surface direction is intersected with second circumferential surface direction；And the multiple light guide light direction is aligned institute State the surface normal of PMT.

2. the optical coupling scanning tester of large area PMT as described in claim 1, which is characterized in that on the Guiding light support The distance between multiple receiving end light connectors it is identical, and each receiving end light connector is to the Guiding light support central point Apart from all the same.

3. the optical coupling scanning tester of large area PMT as claimed in claim 2, which is characterized in that the light source and institute Driving device connection is stated, the driving device can drive the light source to rotate around the central point of the Guiding light support, described whereby Light source selectively alignment couples each receiving end light connector.

4. the optical coupling scanning tester of large area PMT as described in claim 1, which is characterized in that first circumferential surface Direction and second circumferential surface direction intersect vertically or first circumferential surface direction and second circumferential surface direction between angle be Acute angle.

5. the optical coupling scanning tester of large area PMT as described in claim 1, which is characterized in that it further include a bracket, The optically coupled device is arranged on the bracket, and a fixed plate is also equipped on the bracket, and the fixed plate is by institute Multiple light guides are stated to be fixed on the bracket.

6. the optical coupling scanning tester of large area PMT as described in claim 1, which is characterized in that further include one fixed Frame, the fixed frame are installed on the rotating platform, and the fixed frame is arranged concentrically with the rotating platform, described solid Determine frame to match with the PMT, the PMT, which is capable of fixing, to be installed in the fixed frame；The optically coupled device is fixed on described On the outside of fixed frame.

7. the optical coupling scanning tester of large area PMT as claimed in claim 5, which is characterized in that the bracket it is upper It is also equipped with a fixed guide rail, the fixed guide rail matches with the PMT, and the multiple output end light connector is in turn secured to On the fixed guide rail.

8. the optical coupling scanning tester of large area PMT according to any one of claims 1 to 7, which is characterized in that The driving device is stepper motor.

9. claim 1 to 7 it is any as described in large area PMT optical coupling scanning tester, which is characterized in that it is described Light source is light emitting diode or laser diode.

10. a kind of method of the optical coupling sweep test of large area PMT, which is characterized in that provide optical coupling sweep test dress It sets, the optical coupling scanning tester is the optical coupling scanning tester according to any one of claims 1 to 9, It includes rotating platform, optically coupled device and bracket；

The rotating platform can drive the PMT to rotate；

The optically coupled device includes a light source and multiple light guides, and the multiple light guide is used for the sending of the light source Light be successively transmitted to the surface of the PMT；

The optical coupling scan testing methods of the large area PMT the following steps are included:

Measuring process: light source is successively transmitted to the surface of the PMT by the multiple light guide, and collects test data, with complete At mono- longitude of the PMT or latitudinal test；

Spin step: the rotating platform drives the PMT rotation, and another longitude or Position Latitude of the PMT are aligned Light source is successively transmitted to the surface of the PMT by the multiple light guide, the multiple light guide；

Above-mentioned steps are iteratively repeated, to complete the test to the PMT.